Hot melting equipment for plastic processing

Abstract

The utility model discloses hot melting equipment for plastic processing, and belongs to the technical field of plastic processing. The hot melting equipment for plastic processing comprises a hot melting tank body used for melting plastic raw materials and a pretreatment tank used for reducing moisture in the plastic raw materials entering the hot melting tank body, a material conveying pipe is arranged between the hot melting tank body and the pretreatment tank, and a material pumping pump is arranged at one end of the material conveying pipe; a dehumidifying assembly for absorbing moisture in the plastic raw materials is mounted on the pretreatment tank, the dehumidifying assembly comprises a dehumidifying pipe mounted at the top of the pretreatment tank, and an air inlet pipe for introducing hot air is mounted on one side of the bottom of the pretreatment tank. The pretreatment tank is arranged, the pretreatment tank is communicated with the body through the conveying pipe, plastic raw materials can be dehumidified in the pretreatment tank, moisture in the plastic raw materials can be reduced, the situation that the moisture content in the plastic raw materials is too large in the hot melting process can be avoided, and many defective products of plastic products are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic processing, and more specifically to a hot-melt device for plastic processing. Background Art

[0002] The key link of plastic processing. Plastics in various forms (powder, granules, solutions or dispersions) are made into products or blanks of the desired shape. There are more than thirty molding methods. Its selection is mainly determined by the type of plastic (thermoplastic or thermosetting), the initial form, and the shape and size of the product. Common methods for processing thermoplastics include extrusion, injection molding, calendering, blow molding and thermoforming, while thermosetting plastics are generally processed by compression molding, transfer molding, and injection molding. Lamination, compression molding and thermoforming are the processes of molding plastics on a plane. The above plastic processing methods can all be used for rubber processing. In addition, there are castings with liquid monomers or polymers as raw materials. Among these methods, extrusion and injection molding are the most commonly used and basic molding methods.

[0003] Plastics need to be hot-melt treated before processing. After the plastic raw materials are hot-melted into liquid, they can be easily molded into plastic products. Since the plastic raw materials are mainly granular, and the plastic granules need to maintain a low moisture content during the hot-melt process, when the moisture content is too high, it will affect the finished product effect of the plastic products, and it is easy to increase the probability of defective products such as bubbles in plastic products, which will reduce the yield rate.

[0004] The existing plastic hot-melt equipment has the above-mentioned problems. In view of this, we propose a hot-melt equipment for plastic processing. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The utility model aims to provide a hot melt device for plastic processing, so as to solve the problem in the above background technology that the existing plastic hot melt device cannot dehumidify the plastic.

[0007] 2. Technical solution

[0008] A hot melt device for plastic processing comprises a hot melt tank body for melting plastic raw materials and a pretreatment tank for reducing the moisture in the plastic raw materials entering the hot melt tank body, a feed pipe is provided between the body and the pretreatment tank, a feed pump is provided at one end of the feed pipe, a dehumidification component for absorbing moisture inside the plastic raw materials is installed on the pretreatment tank, the dehumidification component comprises a dehumidification pipe installed on the top of the pretreatment tank, an air inlet pipe for introducing hot air is installed on one side of the bottom of the pretreatment tank, and an air distribution component for improving the dehumidification effect is installed inside the pretreatment tank.

[0009] Preferably, the air distribution assembly includes an air distribution plate installed inside the pretreatment tank, the air distribution plate is hollow inside, the top of the air distribution plate is connected to a plurality of air outlet pipes arranged in a vertical direction, and the air outlet pipes are provided with a plurality of exhaust holes.

[0010] Preferably, the exhaust hole is in a cone shape with a larger inner side and a smaller outer side, the exhaust hole is arranged obliquely upward, and the exhaust directions of the exhaust holes on the plurality of exhaust pipes are arranged in a ring shape.

[0011] Preferably, an isolation cap is installed on the outer side of the dehumidification pipe, and an air outlet is opened on the side wall of the isolation cap.

[0012] Preferably, a cover plate for preventing air from being sucked back into the pretreatment tank is installed inside the isolation cap, and a telescopic component is provided between the cover plate and the inner top wall of the isolation cap.

[0013] Preferably, the telescopic assembly comprises a plurality of guide rods slidably connected to the cover plate, and springs are provided on the outer sides of the guide rods.

[0014] Preferably, a conical portion is provided at the bottom of the cover plate, and an outer edge inclined downward is provided at the outer side of the cover plate.

[0015] Preferably, an annular buffer pad is provided at the bottom of the outer edge.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The utility model provides a pretreatment tank, which is connected to the main body through a feed pipe. The plastic raw material can be dehumidified in the pretreatment tank, which can reduce the moisture in the plastic raw material, avoid excessive water content in the plastic raw material during the hot melting process, and avoid a large number of defective plastic products.

[0019] 2. The utility model provides a cover that can be opened and closed according to the air pressure. The cover is located on the top of the dehumidification pipe and is connected to the isolation cap through a spring. When the air pressure inside the dehumidification pipe is too high, the hot air will push the cover open to form a gap for the water vapor to be blown out. Then the air pressure on the inner wall of the dehumidification pipe will decrease, and the spring will restore the cover to its original position to prevent moisture in the external air from entering the pretreatment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the overall structure of the utility model on the left side;

[0022] Figure 3 For the utility model Figure 2 Schematic diagram of the three-dimensional cross section at AA in the middle;

[0023] Figure 4 For the utility model Figure 3 The enlarged view of point A in the middle;

[0024] Figure 5 For the utility model Figure 3 The enlarged view of point B in the middle;

[0025] Explanation of the numbers in the figure: 1. Main body; 2. Pretreatment tank; 3. Feed pipe; 4. Extraction pump; 5. Dehumidification pipe; 6. Air inlet pipe; 7. Air distribution plate; 8. Air outlet pipe; 9. Exhaust hole; 10. Isolation cap; 11. Air outlet; 12. Cover plate; 13. Guide rod; 14. Spring; 15. Conical part; 16. Outer edge; 17. Buffer pad. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] See also Figure 1-5 , the utility model provides a technical solution:

[0030] A hot melt device for plastic processing comprises a hot melt tank body 1 for melting plastic raw materials and a pretreatment tank 2 for reducing the moisture in the plastic raw materials entering the hot melt tank body 1, a feed pipe 3 is provided between the body 1 and the pretreatment tank 2, a feed pump 4 is provided at one end of the feed pipe 3, a dehumidification component for absorbing moisture inside the plastic raw materials is installed on the pretreatment tank 2, the dehumidification component comprises a dehumidification pipe 5 installed on the top of the pretreatment tank 2, an air inlet pipe 6 for introducing hot air is installed on one side of the bottom of the pretreatment tank 2, and an air distribution component for improving the dehumidification effect is installed inside the pretreatment tank 2.

[0031] The utility model is provided with a hot melt tank body 1, so that the plastic raw material can be melted into a liquid state inside the hot melt tank body 1, the pretreatment tank 2 can dehumidify the plastic entering the body 1, and can reduce the moisture in the raw material, the feed pipe 3 is located between the body 1 and the pretreatment tank 2, and the dehumidified plastic raw material can enter the body 1 through the feed pipe 3 under the action of a suction pump 4 for hot melting, the suction pump 4 is a pump commonly used for extracting plastic particles on the market, the dehumidification component can absorb the moisture in the pretreatment tank 2, the steam containing moisture can be discharged from the dehumidification pipe 5, and the hot air enters from the air inlet pipe 6 to dehumidify the plastic raw material in the pretreatment tank 2, and the air distribution component can increase the contact area between the hot air and the plastic raw material, thereby improving the dehumidification effect.

[0032] Specifically, the air distribution component includes an air distribution plate 7 installed inside the pretreatment tank 2, the air distribution plate 7 is hollow inside, and the top of the air distribution plate 7 is connected to a plurality of air outlet pipes 8 arranged in a vertical direction, and the air outlet pipes 8 are provided with a plurality of exhaust holes 9; by setting the air distribution plate 7, the air distribution plate 7 is installed inside the pretreatment tank 2, the air distribution plate 7 is hollow inside, the air distribution plate 7 is connected with the air inlet pipe 6, the air outlet pipe 8 is connected with the air distribution plate 7, and the plurality of exhaust holes 9 on the same air outlet pipe 8 are arranged linearly, and the hot air enters the air distribution plate 7 through the air inlet pipe 6, and the air distribution plate 7 disperses the hot air into the plurality of air outlet pipes 8, and discharges the hot air from the exhaust holes 9 on the air outlet pipes 8, so that the hot air can be evenly blown into the plastic raw materials inside the pretreatment tank 2, thereby improving the dehumidification effect.

[0033] Furthermore, the exhaust hole 9 is a cone with a larger inner side and a smaller outer side. The exhaust hole 9 is arranged upwardly at an angle, and the exhaust directions of the exhaust holes 9 on the multiple air outlet pipes 8 are arranged in a ring shape. By setting the inclined conical exhaust holes 9, the hot air will be accelerated when blown out, and the upward inclination can flip the plastic raw materials to a certain extent. The exhaust holes 9 arranged in a ring shape can reduce the loss of hot air blowing to the inner wall of the pretreatment tank 2.

[0034] It is worth mentioning that an isolation cap 10 is installed on the outside of the dehumidification pipe 5, and an air outlet 11 is opened on the side wall of the isolation cap 10; by setting the isolation cap 10, the isolation cap 10 is installed on the outside of the dehumidification pipe 5, and the air outlet 11 is opened on the side wall of the isolation cap 10, which can prevent external air from entering the pretreatment tank 2.

[0035] It is worth noting that a cover plate 12 is installed inside the isolation cap 10 to prevent air from being sucked back into the pretreatment tank 2, and a telescopic component is provided between the cover plate 12 and the inner top wall of the isolation cap 10; by setting the cover plate 12, the cover plate 12 can clamp the top of the dehumidification pipe 5, and when the internal air pressure is greater than a certain value of the external air pressure, the water-containing gas will push the cover plate 12 open and flow out, otherwise the cover plate 12 can be close to the dehumidification pipe 5 to prevent external air from entering.

[0036] More specifically, the telescopic assembly includes a plurality of guide rods 13 slidably connected to the cover plate 12, and a spring 14 is provided on the outer side of the guide rod 13; by providing the guide rod 13, the guide rod 13 is slidably connected to the cover plate 12, and the spring 14 is located on the outer side of the guide rod 13. Such a configuration can make the cover plate 12 close to the dehumidification pipe 5. When the air pressure in the dehumidification pipe 5 reaches a certain level, the elastic force of the spring 14 will be overcome to push open the cover plate 12, thereby preventing external air from entering therein.

[0037] In addition, a conical portion 15 is provided at the bottom of the cover plate 12, and an outer edge 16 inclined downward is provided on the outer side of the cover plate 12; by providing the conical portion 15, the conical portion 15 can prevent the airflow from leaking out of the pretreatment tank 2, and the amount of gas flowing out at one time is small, thereby reducing the loss of hot air.

[0038] It must be mentioned that an annular buffer pad 17 is provided at the bottom of the outer edge 16 ; by providing the buffer pad 17 , the buffer pad 17 can reduce the impact force when the cover plate 12 is reset, and at the same time improve the sealing effect inside and outside the cover plate 12 .

[0039] Working principle: First, hot air is introduced into the pretreatment tank 2 through the air inlet pipe 6 to keep the temperature inside the pretreatment tank 2 suitable for dehumidification. After a certain period of time, the plastic raw materials are put into the pretreatment tank 2. As the plastic raw materials are put in, the plastic raw materials will be heated. During the heating process, the moisture on the plastic raw materials and in the air when they are put in will be evaporated by the hot air, and the evaporated moisture will be discharged from the dehumidification pipe 5 along with the hot air. When the air pressure inside the dehumidification pipe 5 reaches a certain level, the hot air will push the cover plate 12 to move, and a certain gap will be formed between the cover plate 12 and the dehumidification pipe 5. The hot air containing moisture will be discharged from this gap. When the humidity inside the pretreatment tank 2 drops to a certain level, the dehumidified plastic raw materials are transported to the hot melt tank body 1 through the feed pipe 3 by the suction pump 4 for melting.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A hot melt equipment for plastic processing, characterized in that: The invention comprises a hot melt tank body (1) for melting plastic raw materials and a pretreatment tank (2) for reducing the moisture in the plastic raw materials entering the hot melt tank body (1); a feed pipe (3) is provided between the body (1) and the pretreatment tank (2); a feed pump (4) is provided at one end of the feed pipe (3); a dehumidification component for absorbing the moisture inside the plastic raw materials is installed on the pretreatment tank (2); the dehumidification component comprises a dehumidification pipe (5) installed on the top of the pretreatment tank (2); an air inlet pipe (6) for introducing hot air is installed on one side of the bottom of the pretreatment tank (2); and an air distribution component for improving the dehumidification effect is installed inside the pretreatment tank (2).

2. A hot melt equipment for plastic processing according to claim 1, characterized in that: The air distribution assembly comprises an air distribution plate (7) installed inside the pretreatment tank (2); the air distribution plate (7) is hollow inside; the top of the air distribution plate (7) is connected to a plurality of air outlet pipes (8) arranged in a vertical direction; and the air outlet pipes (8) are provided with a plurality of exhaust holes (9).

3. A hot melt equipment for plastic processing according to claim 2, characterized in that: The exhaust hole (9) is in the shape of a cone with a larger interior and a smaller exterior. The exhaust hole (9) is arranged obliquely upward, and the exhaust directions of the exhaust holes (9) on the plurality of air outlet pipes (8) are arranged in a circular shape.

4. A hot melt equipment for plastic processing according to claim 1, characterized in that: An isolation cap (10) is installed on the outer side of the moisture dehumidification pipe (5), and an air outlet (11) is provided on the side wall of the isolation cap (10).

5. A hot melt equipment for plastic processing according to claim 4, characterized in that: A cover plate (12) for preventing air from being sucked back into the pretreatment tank (2) is installed inside the isolation cap (10), and a telescopic component is provided between the cover plate (12) and the inner top wall of the isolation cap (10).

6. A hot melt equipment for plastic processing according to claim 5, characterized in that: The telescopic assembly comprises a plurality of guide rods (13) slidably connected to the cover plate (12), and a spring (14) is provided on the outer side of the guide rods (13).

7. A hot melt equipment for plastic processing according to claim 6, characterized in that: The bottom of the cover plate (12) is provided with a tapered portion (15), and the outer side of the cover plate (12) is provided with an outer edge (16) inclined downward.

8. A hot melt equipment for plastic processing according to claim 7, characterized in that: An annular buffer pad (17) is provided at the bottom of the outer edge (16).

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